The MT88E45BSR is a single-chip FSK/DTMF transceiver designed by Zarlink Semiconductor (now Microsemi, part of Microchip Technology). It integrates both Frequency Shift Keying (FSK) and Dual-Tone Multi-Frequency (DTMF) functionalities, making it suitable for applications requiring both data and voice transmission over telephone lines.

Applications

• Caller ID systems
• Remote control systems
• Security systems
• Point-of-sale (POS) terminals
• Automated meter reading (AMR)
• Data communication over voice lines
• Telephone answering machines

Features

• FSK demodulation and DTMF detection
• Single 5V power supply
• Low power consumption
• Adjustable gain
• DTMF transmit function
• FSK transmit function
• Crystal oscillator or external clock input
• Serial data interface

Benefits

• Integrates both FSK and DTMF functionalities into a single chip
• Reduces component count and system cost
• Simple interface to microcontrollers
• Suitable for low-power applications
• Allows for flexible gain adjustment
• Supports both DTMF and FSK transmission
• Provides flexibility in clock source selection
• Enables easy data communication

Technical Specifications

The MT88E45BSR operates from a single 5V power supply and features low power consumption. It supports both Bell 202 and V.23 FSK standards for data transmission. The device includes adjustable gain settings to optimize performance for different line conditions. It incorporates a crystal oscillator circuit, allowing it to operate with an external crystal or from an external clock source. The serial data interface allows for easy communication with microcontrollers and other digital devices. The device also includes DTMF transmit functionality, enabling it to generate DTMF tones for dialing and control purposes.

The MT88E45BSR is a versatile and widely used FSK/DTMF transceiver that provides a cost-effective solution for data and voice communication over telephone lines. Its low power consumption, simple interface, and integrated functionalities make it a popular choice for designers of caller ID systems, remote control systems, and other similar applications.